GDUKOP Engine Coolant Expansion Reservoir Tank 603-054 with Cap — PA Plastic Direct-Fit for GM Trucks and SUVs

This replacement coolant expansion tank is molded from heat-resistant PA plastic and includes the pressure cap, offering a durable, ready-to-install solution for cooling-system maintenance. It is designed to capture overflow coolant, relieve excess pressure as the engine warms, and return fluid to the radiator as temperatures normalize. The unit matches multiple original equipment numbers and arrives backed by a one-year unlimited-mileage warranty.

Which vehicles is this expansion tank compatible with?

The GDUKOP 603-054 fits a wide range of General Motors full-size trucks and SUVs across several model years. Verify fitment by comparing your OE number or checking the listed models before purchase to ensure a correct match.

• Cadillac Escalade / Escalade ESV: 2007–2014
• Chevrolet Silverado 1500: 2007–2013; Silverado 2500/3500: 2010–2013
• Chevrolet Tahoe / Avalanche / Suburban (various model years listed)
• GMC Sierra 1500/2500/3500 and Yukon / Yukon XL: 2007–2018 depending on model

How does this tank function within the cooling system?

The expansion tank, also called an antifreeze reservoir, stores and manages coolant volume changes caused by temperature fluctuation. As coolant heats and expands, the tank accepts overflow to prevent excessive pressure in the radiator. When the engine cools, coolant is drawn back into the cooling circuit to maintain proper fluid level and system performance.

• Accepts expanded coolant to prevent radiator overpressure
• Returns coolant to the radiator as temperatures drop
• Includes a pressure cap to regulate system pressure and release excess safely

What materials and quality standards does this replacement meet?

Constructed from high-temperature PA (polyamide) plastic, this reservoir is built to resist heat, vibration, and ordinary road stresses. The design and materials aim to provide long service life comparable to OEM parts, while resisting warping and premature failure often seen with lower-grade replacements.

• Durable PA plastic resists heat and vibration
• Factory-style inlet and outlet locations for direct installation
• Supplied with matching pressure cap to maintain correct system operation

Which OE numbers does it replace, and what warranty is included?

This GDUKOP expansion tank is manufactured to match several OE reference numbers so it can serve as a direct replacement during repairs. The product includes a limited one-year unlimited-mileage guarantee and direct customer support for questions or concerns after purchase.

• Replaces OE references such as 603-054, 22870828, 22797286, 15833723, 13502353, 797286
• One-year unlimited-mileage warranty from date of purchase
• Customer support promise: response within 48 hours for inquiries

Who is this for? This reservoir tank is intended for owners and technicians working on GM full-size trucks and SUVs listed above who need a reliable, direct-fit coolant expansion tank. It's suitable for DIYers performing cooling-system maintenance, independent repair shops replacing failed reservoirs, and fleet managers wanting an OEM-referenced replacement backed by a one-year warranty.